Question

If Mr. Carter's car can accelerate at

2.5m/s² and he starts from rest, how long will it take him to get to the other side of an intersection that is 30m wide?

(I forgot the equation for these kinds of problems and can't find it anywhere in my notes please help) ​

Answer 1

The time taken by the car to get to the other side of an intersection is, t = 4.9 s

Step-by-step explanation:

Given data,

The acceleration of the car, a = 2.5 m/s²

The initial velocity of the car, u = 0

The distance traveled, s = 30 m

Using the II equations of motion,

S = ut + ½ at²

Therefore,

t = √(2S/a) ( since u = 0)

Substituting the values

t = √(2 x 30 / 2.5)

= 4.9 s

Hence, the time taken by the car to get to the other side of an intersection is, t = 4.9 s